Updated key to Gibbobruchus species

To accommodate the species here described, the key to the Gibbobruchus species proposed by Manfio et al. (2013, p. 9) is modified as follows:

Couplets 1–3 without change.

4. Dorsum with short pubescence, mainly white or grayish, contrasting with the dark integument (Figs 1,2); pecten with a maximum of 3 teeth, distal tooth often bifid.................................................................. 4A 4’. Dorsum with dense or sparse long pubescence, mainly pale brown (see Manfio et al. 2013: p. 6, Fig. 9); elytron in general with conspicuous mottled, when not conspicuous, pubescence not contrasting with the integument; pecten with 4 or more teeth (see Manfio et al. 2013: p. 27, Fig. 102)....................................................................... 5 4A. Antenna flabellate (see Manfio et al. 2013: p. 6, Fig. 8); pygidium with speculum in both sexes, bituberculate in female and flat in male (see Manfio et al. 2013: p. 21, Fig. 55; p. 22, Fig. 65)........................... G. polycoccus (Fåhraeus, 1839) 4A’. Antenna subserrate (Figs 3, 4); male pygidium with small glabrous apical area (Fig. 5), female pygidium with speculum (Fig. 6)........................................................ G. tridentatus Manfio, Jorge & Ribeiro-Costa sp.nov.

Couplets 5–12 without change.